Andrew Adonis

A key Labour figure in the House of Lords, Adonis is seen by the soft Brexit camp as important in the upper chamber.

He has a reputation for being like a “dog with a bone” when he decides to campaign on an issue, colleagues said.

With piles of legislation coming this session, he could bring a bit of organization to the Lords chaos.

PARTY: Labour

POSITION: Former secretary of state for transport, in the House of Lords

MP SINCE: Not an MP, a Lord since 2005

REMAINIAC OR BREXTREMIST? Remain

Return to the full list of 40 Brexit troublemakers to discover who to watch as legislation disentangling Britain from the European Union goes through the U.K. parliament. For an explanation of how this list was compiled, see here.